Super-Semi Heterostructures for Novel Qubit Geometries
Superconducting qubits are the current leaders in quantum computing technology. They utilize shunt capacitors and Josephson junctions made within a superconducting circuit to create a two-level computational subspace. Over the past 15 years, superconducting qubits have seen a seven-fold increase in coherence time and energy relaxation. However, current state-of-the-art qubits remain bottlenecked by material imperfections which can create dielectric loss at interfaces and across Josephson junctions. Our lab is working to improve the quality of materials used in superconducting qubit technology and understand the material origin of loss within devices. We collaborate with the Pappas research lab at NIST Boulder where qubits made from our materials are fabricated and measured.